Kod programskog paketa NSS (Network Security Services) uočena je sigurnosna ranjivost koja udaljenom napadaču omogućuje izvođenje DoS napada.

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Ubuntu Security Notice USN-1540-1
August 16, 2012

nss vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

NSS could be made to crash if it opened a specially crafted certificate.

Software Description:
- nss: Network Security Service library

Details:

Kaspar Brand discovered a vulnerability in how the Network Security
Services (NSS) ASN.1 decoder handles zero length items. If the user were
tricked into opening a specially crafted certificate, an attacker could
possibly exploit this to cause a denial of service via application crash.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 11.10:
  libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu6.1

Ubuntu 11.04:
  libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu2.2

Ubuntu 10.04 LTS:
  libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu0.10.04.4

After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1540-1
  CVE-2012-0441

Package Information:
  https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu6.1
  https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu2.2
  https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu0.10.04.4